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24 VDC appliances?
Rod McInnis wrote:
When looking for 24 volt equipment, take a look at commercial and "mega yacht" sources. Lights shouldn't be a problem, but you may find that electronics are scarce and very expensive. Most newbuild megayachts are equipped with very comprehensive AC electrical generation, regulation, and distribution systems. The last large (165') yacht I sailed on was wired like most of its class and used a wheelhouse mounted bank of batteries to supply the electronics. That bank was float charged by a charger mounted in the battery room. No one is going to run DC supplies from a central location on a larger boat. Depending on the certification standards a local emergency supply is required in any event. While I have not bothered to search, the selection of marine equipment available in 24VDC must be very very small. Most all little boats use 12VDC, most larger boats use 110/220/480VAC. There used to be a pretty good selection of 32VDC stuff but even then most heating was provided by burning fuel directly. It strikes me as absurd to run a heating or cooking system on DC unless it comes straight from a DC generator and even then, nowadays, why bother. There are several diesel fired heating boilers available for hydronic heating that can be supplanted with waste heat when the main propulsion is online or a genset when it's not. The megayacht industry has developed some outstanding power management systems but none of them include low voltage DC for heating or cooking. It just isn't practical, even in larger scale, and certainly not when you have to burn diesel in a generator to charge a battery to supply an inverter to heat a resistance coil to make heat. Rick |
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